Who are the four immortals in the perfect world?

The four immortals in the perfect world are: Shi Hao: The hero of this book was born supreme, but his brother Shiyi and his mother seized the supreme bone, which led to serious illness and dying, and was later fostered by his parents in the ancestral land. After nine days in the wild, the teenager swept through the pass of the Imperial Capital, creating a secret cultivation system of the human body, calming the source of darkness and turmoil, and leaving a relatively peaceful environment for future generations with a sword.